Before 1670, British activity in Belize was primarily linked to the logging industry and the establishment of settlements. Here are some key points of evidence regarding British involvement in the region during that period:

1. Early Exploration and Settlement: The British began to explore the Caribbean and Central America in the early 17th century. By the 1630s, British loggers, primarily from Jamaica, started to exploit the abundant mahogany resources in the area that is now Belize.

2. Logging Industry: The logging of mahogany became a significant economic activity. British settlers established camps along the Belize River and other coastal areas to harvest timber. This activity was often conducted in a semi-organized manner, with loggers forming small communities.

3. Conflict with the Spanish: The British presence in Belize was not without conflict. The Spanish, who claimed the territory as part of their colonial holdings, frequently clashed with British loggers. The Spanish viewed the British activities as illegal incursions into their territory, leading to skirmishes and tensions.

4. The Treaty of Madrid (1670): Although the treaty itself was signed in 1670, it is crucial to note that it recognized British interests in the region. The treaty aimed to resolve conflicts between Spain and Britain, acknowledging British logging rights in Belize, which can be seen as a formal recognition of their prior activities.

5. Archaeological Evidence: Archaeological findings in Belize, including remnants of early settlements and tools used for logging, support the historical accounts of British activity in the region. These findings indicate that British settlers were present and engaged in resource extraction before the formal recognition of their rights.

In summary, British activity in Belize before 1670 was characterized by logging, settlement, and conflict with Spanish authorities, laying the groundwork for future British colonial interests in the area.